Navigation Links
Weizmann Institute scientists show: How adversity dulls our perceptions
Date:5/11/2011

Adversity, we are told, heightens our senses, imprinting sights and sounds precisely in our memories. But new Weizmann Institute research, which appeared in Nature Neuroscience this week, suggests the exact opposite may be the case: Perceptions learned in an aversive context are not as sharp as those learned in other circumstances. The findings, which hint that this tendency is rooted in our species' evolution, may help to explain how post-traumatic stress syndrome and other anxiety disorders develop in some people.

To investigate learning in unfavorable situations, Dr. Rony Paz of the Institute's Neurobiology Department, together with his student Jennifer Resnik , had volunteers learn that some tones lead to an offensive outcome (e.g. a very bad odor), whereas other tones are followed by pleasant a outcome, or else by nothing. The volunteers were later tested for their perceptual thresholds that is, how well they were able to distinguish either the "bad" or "good" tones from other similar tones.

As expected from previous studies, in the neutral or positive conditions, the volunteers became better with practice at discriminating between tones. But surprisingly, when they found themselves exposed to a negative, possibly disturbing stimulus, their performance worsened.

The differences in learning were really very basic differences in perception. After learning that a stimulus is associated with highly unpleasant experience, the subjects could not distinguish it from other similar stimuli, even though they could do so beforehand, or in normal conditions. In other words, no matter how well they normally learned new things, the subjects receiving the "aversive reinforcement" experienced the two tones as the same.

Paz: "This likely made sense in our evolutionary past: If you've previously heard the sound of a lion attacking, your survival might depend on a similar noise sounding the same to you and pushing the same emot
'/>"/>

Contact: Yivsam Azgad
news@weizmann.ac.il
972-893-43856
Weizmann Institute of Science
Source:Eurekalert

Page: 1 2

Related medicine news :

1. Weizmann Institute scientists discover: Antioxidants cause fertility problems in females
2. Medical Training School, Pima Medical Institute Offering First Bachelor's Degree Program
3. Dana-Farber and Sanford-Burnham Institute license flu-targeting antibodies to Genentech and Roche
4. Laser Spine Institute Honored at the Gridiron Greats Night of Champions
5. Akron Institute of Herzing University Launches Its First Bachelors Degree Programs to Prepare Students for Even Greater Success in Business, Health Care and IT
6. Carpet and Rug Institute Expands Seal of Approval Program
7. San Diego State University and BIOCOM Institute Receive $4.95 Million Grant: The BRIDGE Project, Linking Education to Employment in San Diegos Life Sciences Industry
8. Northern California Cancer Center Changes Name to Cancer Prevention Institute of California
9. ChildCare Education Institute Supports the First Ladys Efforts to Reduce Childhood Obesity
10. GREENGUARD Environmental Institute Revamps Web Site
11. JBG to Develop Major Research Campus for National Cancer Institute
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/14/2014)... EurekaMag.com has newly published results of ... contagious liver disease that ranges in severity from ... serious, lifelong illness that attacks the liver. An estimated ... Hepatitis C virus infection of which approximately 80% of ... category covers all studies on Hepatitis C , the ...
(Date:7/14/2014)... "Medical devices, tests, and treatments are critical ... is a star when it comes to innovations in ... working on amazing products and ideas that are our ... to Dale Kaye CEO of the Innovation Tri-Valley ... brilliant minds and businesses that are leading society into ...
(Date:7/14/2014)... WI (PRWEB) July 14, 2014 Doctor ... announced the launch of their new company website. The ... valuable free information on chiropractic marketing. It's also a ... that Inception has to offer. , When contacted at ... the newest version of our main website. Our site ...
(Date:7/14/2014)... Essex, CT (PRWEB) July 14, 2014 Summer ... means vacations, camping, days at the beach, swimming and other ... want everyone to be safe, happy and healthy all summer ... of a list of the three must-have custom imprinted products ... first summer essential is of course sunblock. Sunscreen ...
(Date:7/13/2014)... 2014 Save the Date for the 2014 ... Jacksonville, FL , BOXWOODS & BowTies “A Modern Twist on ... The Women’s Board of Wolfson Children’s Hospital will ... to continue their ongoing commitment to raising funds for the ... , What: The 2014 Art & Antiques Show is a ...
Breaking Medicine News(10 mins):Health News:EurekaMag.com Publishes 64,900 New Studies on Hepatitis C 2Health News:Believing in the Possible – Innovation Tri-Valley’s Sixth Innovation Forum Examines the Tri-Valley’s Wealth of Innovators 2Health News:Believing in the Possible – Innovation Tri-Valley’s Sixth Innovation Forum Examines the Tri-Valley’s Wealth of Innovators 3Health News:Believing in the Possible – Innovation Tri-Valley’s Sixth Innovation Forum Examines the Tri-Valley’s Wealth of Innovators 4Health News:Doctor Mike Hamilton From Inception Chiropractic Websites Announces the Launch of Their New Website 2Health News:Why These Three Summer Essentials from 4AllPromos Can Improve Summer 2Health News:Save the Date for the 2014 Art & Antiques Show benefiting Wolfson Children's Hospital in Jacksonville, FL 2Health News:Save the Date for the 2014 Art & Antiques Show benefiting Wolfson Children's Hospital in Jacksonville, FL 3Health News:Save the Date for the 2014 Art & Antiques Show benefiting Wolfson Children's Hospital in Jacksonville, FL 4Health News:Save the Date for the 2014 Art & Antiques Show benefiting Wolfson Children's Hospital in Jacksonville, FL 5Health News:Save the Date for the 2014 Art & Antiques Show benefiting Wolfson Children's Hospital in Jacksonville, FL 6Health News:Save the Date for the 2014 Art & Antiques Show benefiting Wolfson Children's Hospital in Jacksonville, FL 7Health News:Save the Date for the 2014 Art & Antiques Show benefiting Wolfson Children's Hospital in Jacksonville, FL 8Health News:Save the Date for the 2014 Art & Antiques Show benefiting Wolfson Children's Hospital in Jacksonville, FL 9
... 21 LUMEDX Corporation, a leading,provider of ... introduces software to manage data and track ... Module empowers clinicians,by making critical clinical information ... For more information -- including a free ...
... May 20 The U.S. Department of,Health and ... advertising,campaign focusing on the quality of care available ... HHS, Centers for Medicare & Medicaid Services (CMS),in ... newspapers, promote Hospital,Compare ( http://www.hospitalcompare.hhs.gov ), an easy-to-use ...
... researchers,found that the frequency with which critically-ill patients ... a,multidisciplinary medical center such as Mayo Clinic compared ... the National Healthcare Safety,Network (NHSN). This is good ... are generally strong across the U.S. in intensive ...
... 2008) A newly published study presents data ... (COPD), including emphysema and chronic bronchitis, experienced markedly ... a combination of nebulized formoterol fumarate inhalation solution ... treatment with tiotropium alone. The two medications, ...
... BEDFORD, Mass., May 20 Hologic, Inc. (Nasdaq:,HOLX) today ... at the NASDAQ 21st Investor Program being held May ... parties are invited to listen to a live audio ... at 10:45 a.m.,BST on the investor section of the ...
... One of 35,000 Doctors Now Using E-Prescribing, ... (PCMA) is unveiling a new print ad campaign ... successfully use electronic,prescribing (e-prescribing) technology and who also ... new ad features Dr. R. David Allard, a ...
Cached Medicine News:Health News:New Anticoagulation Management Software Helps Clinics Enhance Efficiency and Improve Patient Safety 2Health News:National Ad Campaign Highlights Patient Ratings For More Than 1,000 Local U.S. Hospitals 2Health News:National Ad Campaign Highlights Patient Ratings For More Than 1,000 Local U.S. Hospitals 3Health News:Mayo Clinic Research Shows U.S. Intensive Care Units' Prevention of Pneumonia in Critically-ill Patients Generally Strong; Identifies Area of Improvement 2Health News:Mayo Clinic Research Shows U.S. Intensive Care Units' Prevention of Pneumonia in Critically-ill Patients Generally Strong; Identifies Area of Improvement 3Health News:Concomitant treatment with nebulized formoterol fumarate & tio-significant improvements -- COPD 2Health News:Concomitant treatment with nebulized formoterol fumarate & tio-significant improvements -- COPD 3Health News:Concomitant treatment with nebulized formoterol fumarate & tio-significant improvements -- COPD 4Health News:PCMA's New Ad Campaign: E-Prescribing is Ready Now 2
(Date:7/11/2014)... DUBLIN , July 11, 2014 ... the addition of the "Immunoprotein Diagnostic Testing ... at the highest CAGR of 6% and is ... report to their offering. ... for immunoprotein diagnostic testing has been segmented according ...
(Date:7/10/2014)... 2014  Major advances in radiation therapy and ... highlighted in a three-day Oncology Summit taking place ... 2014.  Renowned national and international cancer experts from seven ... exchange knowledge on modern technologies making treatment for ... The Summit will address a wide ...
(Date:7/10/2014)... -- Integrated Silicon Solution, Inc. (Nasdaq: ISSI ... solutions, today announced that it will host its earnings ... a.m. Pacific Time (10:00 a.m. Eastern Time) to discuss ... quarter ended June 30, 2014. To access ... a.m. Pacific time on July 24, 2014.  The participant ...
Breaking Medicine Technology:Immunoprotein Diagnostic Testing Market - Forecasts to 2019: Expected to grow at the highest CAGR of 6% and is expected to be valued at USD 4,943.0 million 2Improving quality and access to advanced cancer care in India and South Asia 2Improving quality and access to advanced cancer care in India and South Asia 3Improving quality and access to advanced cancer care in India and South Asia 4Improving quality and access to advanced cancer care in India and South Asia 5
... 16 Patients and clinicians should consider risk factors ... smoking and risk of gastrointestinal bleeding -- before deciding ... strokes, according to new recommendations from the U.S. Preventive ... to people who have already had a heart attack ...
... Healthpoint today announced that it has initiated a Phase ... venous leg ulcers. HP802-247 is a topical spray containing ... determine the effectiveness of two cell concentrations and two ... compared to placebo plus standard care, in healing venous ...
Cached Medicine Technology:Task Force Recommends Using Aspirin to Prevent Cardiovascular Disease When the Benefits Outweigh the Harms 2Task Force Recommends Using Aspirin to Prevent Cardiovascular Disease When the Benefits Outweigh the Harms 3Healthpoint Initiates Phase II, Dose-Finding Study to Evaluate Effectiveness of a Unique Cell Based Therapy in Venous Leg Ulcers 2Healthpoint Initiates Phase II, Dose-Finding Study to Evaluate Effectiveness of a Unique Cell Based Therapy in Venous Leg Ulcers 3
... system consists of four basic components: sample well ... clamping plate (see diagram). The sample well plate ... dots, or slots (see below). All three plates ... accessory plate in conjunction with a complete system. ...
... Bio-Dot SF (slot format) microfiltration units provide ... nucleic acid in solution onto nitrocellulose or ... accommodated by using interchangeable templates to form ... format Bio-Dot SF apparatus. Each is available ...
... SF (slot format) microfiltration units provide a ... acid in solution onto nitrocellulose or Zeta-Probe ... by using interchangeable templates to form the ... Bio-Dot SF apparatus. Each is available as ...
24-Well Slot Blot...
Medicine Products: